LLM Reference

Claude 3.7 Sonnet vs DeepSeek V4 Flash

Claude 3.7 Sonnet (2024) and DeepSeek V4 Flash (2026) are frontier-tier reasoning models from Anthropic and DeepSeek. Claude 3.7 Sonnet ships a 200k-token context window, while DeepSeek V4 Flash ships a 1m-token context window. On MMLU PRO, DeepSeek V4 Flash leads by 6.1 pts. This comparison covers specs, pricing, API access, capabilities, benchmarks, input and output token costs, and production fit for coding and agent workloads.

DeepSeek V4 Flash fits 5x more tokens; pick it for long-context work and Claude 3.7 Sonnet for tighter calls.

Decision scorecard

Local evidence first
SignalClaude 3.7 SonnetDeepSeek V4 Flash
Best forreasoning-heavy apps, multimodal apps, and tool-calling agentsreasoning-heavy apps, tool-calling agents, and long-context analysis
Decision fitCoding, RAG, and AgentsCoding, RAG, and Agents
Context window200k1m
Cheapest output$15/1M tokens$0.12/1M tokens
Provider routes6 tracked5 tracked
Shared benchmarks4 sharedMMLU PRO leader

Decision tradeoffs

Choose Claude 3.7 Sonnet when...
  • Claude 3.7 Sonnet holds a shared-benchmark lead on HumanEval, ahead by 23.5 points.
  • Claude 3.7 Sonnet has broader tracked provider coverage for fallback and route flexibility.
  • Claude 3.7 Sonnet uniquely exposes Vision, Multimodal, and Code execution in local model data.
  • Local decision data tags Claude 3.7 Sonnet for Coding, RAG, and Agents.
Choose DeepSeek V4 Flash when...
  • DeepSeek V4 Flash holds a shared-benchmark lead on MMLU PRO, ahead by 6.1 points.
  • DeepSeek V4 Flash has the larger context window for long prompts, retrieval packs, or transcript analysis.
  • DeepSeek V4 Flash has the lower cheapest tracked output price at $0.12/1M tokens.
  • Local decision data tags DeepSeek V4 Flash for Coding, RAG, and Agents.

Monthly cost at traffic

Estimate token spend from the cheapest tracked input and output route or tier on this page.

Lower estimate DeepSeek V4 Flash

Claude 3.7 Sonnet

$6,150

Cheapest tracked route/tier: GCP Vertex AI

DeepSeek V4 Flash

$76.26

Cheapest tracked route/tier: OpenRouter

Estimated monthly gap: $6,074. Batch, cache, alternate speed tiers, and negotiated pricing are excluded from this local estimate.

Switch friction

Claude 3.7 Sonnet -> DeepSeek V4 Flash
  • Provider overlap exists on OpenRouter; start route-level A/B tests there.
  • DeepSeek V4 Flash is $14.88/1M tokens lower on cheapest tracked output pricing before cache, batch, or negotiated discounts.
  • Check replacement coverage for Vision, Multimodal, and Code execution before moving production traffic.
DeepSeek V4 Flash -> Claude 3.7 Sonnet
  • Provider overlap exists on OpenRouter; start route-level A/B tests there.
  • Claude 3.7 Sonnet is $14.88/1M tokens higher on cheapest tracked output pricing, so quality gains need to justify the spend.
  • Claude 3.7 Sonnet adds Vision, Multimodal, and Code execution in local capability data.

Specs

Specification
Released2024-03-042026-04-24
Context window200k1m
Parameters—284B
ArchitectureDecoder OnlyMixture of Experts
LicenseProprietaryMITOSI-approved
OpennessProprietaryOpen source
WeightsNot releasedAvailable
CodeUnknownUnknown
Commercial useCommercial use: conditionalCommercial use: permitted
Knowledge cutoff2024-11-

Pricing and availability

Pricing attributeClaude 3.7 SonnetDeepSeek V4 Flash
Input price$3/1M tokens
Off-peak
$0.22/1M tokens
All UTC hours outside DeepSeek's peak windows. Cache-hit input: $0.007 per 1M tokens; cache-miss input: $0.22 per 1M; output: $0.66 per 1M.
Peak
$0.44/1M tokens
01:00-04:00 and 06:00-10:00 UTC. Cache-hit input: $0.014 per 1M tokens; cache-miss input: $0.44 per 1M; output: $1.32 per 1M.
Output price$15/1M tokens
Off-peak
$0.66/1M tokens
All UTC hours outside DeepSeek's peak windows. Cache-hit input: $0.007 per 1M tokens; cache-miss input: $0.22 per 1M; output: $0.66 per 1M.
Peak
$1.32/1M tokens
01:00-04:00 and 06:00-10:00 UTC. Cache-hit input: $0.014 per 1M tokens; cache-miss input: $0.44 per 1M; output: $1.32 per 1M.
Providers
Snowflake CortexGCP Vertex AIReplicate APIOpenRouterAWS BedrockAnthropic
DeepSeek PlatformOpenRouterMicrosoft FoundryVercel AI GatewayNovita AI

Capabilities

CapabilityClaude 3.7 SonnetDeepSeek V4 Flash
VisionYesNo
MultimodalYesNo
ReasoningYesYes
JSON / Tool useYesYes
Structured outputsYesYes
Code executionYesNo
IDE integrationNoNo
Computer useNoNo
Parallel agentsNoNo

Benchmarks

BenchmarkClaude 3.7 SonnetDeepSeek V4 Flash
MMLU PRO80.386.4
SWE-bench Verified70.379.0
LiveCodeBench68.991.6
HumanEval93.069.5

Continue comparing

Model pages
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Last reviewed: 2026-07-26. Data sourced from public model cards and provider documentation.